Pilot burner heat dissipator



ca. 20, 1953 L. H. MC CAMMANT 2,655,913

PILOT BURNER HEAT DISSIPATOR Filed Dec. 30, 1949 Patented Oct. 20, 1953UNITED STATES TENT OFFICE PILOT BURNER HEAT DISSIPATOR Leonard H.McCammant, Rockford, IlL, assignor to Geo. D. Roper Corporation,Rockford. 111., a corporation of Illinois 5 Claims.

This invention relates to heat deflectors or dissipators and moreparticularly to heat deflector or dissipators for pilot burners and thelike.

In conventional ranges and stoves, main burners are in general mountedto be accessible from the top of the range and are arranged to beignited from a single constantly burning pilot burner disposed inlighting proximity to all of the burners. To provide a compact assemblythe pilot burner is disposed substantially centrally of the burnersimmediately below the top of the range. As a consequence there is anarea on the top of the range immediately above the pilot burner that isextremely hot; and should a person accidentally come in contact withthis area on the top of the range he would be severely burned. From asafety standpoint and hazard to the operating personnel this is a veryundesirable feature.

Accordingly, an object of this invention is the provision of a rangehaving novel means for dissipating the heat of the constantly burningpilot burner so as to prevent the formation of hot spots on the top ofthe range.

Another object of the invention is the provision of novel mean fordissipating the heat from a concentrated heat source, that is highlyeflicient, rugged, simple and that is relatively inexpensive.

Other objects and advantages of the invention will become apparent fromthe following detailed description taken in connection with theaccompanying drawings, in which- Figure 1 is a fragmentary perspectiveview of a top of a range with portions cutaway to show the heatdissipator embodying the present invention;

Fig. 2 is a plan View of the heat dissipator;

Fig. 3 is a side view of a heat dissipator;

Figs. 4 and 5 are sectional views taken substantially along the lines 44and 55 respectively of Fig, 3;

Fig. 6 is a longitudinal sectional view taken along the line 6-6 ofFigure 1, and

Fig. '7 is a modification of the invention with one end of thedissipator deformed to project upwardly in a back rail of the range.

Referring now to the drawings, the invention is shown embodied in aconventional gas range. For purposes of simplifying the drawings onlythe upper part of the range is shown. As shown the range includes a bodyH having a front I2 and ends I3, one onl being shown. A burner box M,defined by spaced side and end walls I6, is mounted at the top of thebody to receive main burners ll. The burners are supported by strips issuitably mounted on the body and are connected to a gas supply in aconventional manner by means not shown. A cooking top l9, provided withapertures through which the main burners Il may project, is mounted onthe top of the body and a constantly burning pilot burner assembly 2| issuitably mounted in the burner box between the front and back of therange for lighting the main burners ll. As shown, the pilot burnerassembly is of conventional construction and include a burner 22, ashield 23 encircling the burner 22, and flash tubes 24 effectingcommunication between the pilot burner 22 and the main burners H forflashing the flame from the pilot burner 22 to the main burners 11.

One phase of the invention is concerned with the provision of means in agas range for preventing hot spots or areas of concentrated heat on thetop [9 of the range above the pilot burner. To accomplish the foregoinga heat dissipator 26 is disposed between the pilot burner .22 and thetop lg to carry off the products of combustion and dissipate the heatgradually as the products of combustion flow away from the pilot burner.

In this embodiment of the invention the dissipator 26 comprises a pairof inverted channelshaped members 2'! and 28 mounted in spaced relationas shown. The channel member 21, which is the bottom member shown inFigs. 3, 4 and 5, comprises a bridging portion 2a and spaced sides 3|.The channel member 21 is sufiiciently long so that one end thereofoverlies the pilot burner 22 and the opposite end rests on the side wallIt of the burner box It. An end 32 of the channel member 2'? is closedwhile the opposite end 33 is open. The channel member 28, which is thetop member shown in Figs. 3, 4 and 5, comprises a bridging portion 34and spaced sides 36. The end 31 of the channel member 28 is closed andthe end 38 is open. The sides 3| and 3B of the channel members aremaintained in spaced relation by crimps 39 formed in the sides 36 of thechannel-shaped member 28. The bridging portion 29 is maintained inspaced relation with the bridging portion 34 by tabs 4| and 42 formed atopposite ends of the channehshaped member 28. As best shown in Fig. 6the extreme end of the tabs M and 42 are shaped to extend into openingsformed in the bridging portion 29 of the channel-shaped member 21 sothat the tabs can be bent back to engage the underside of the bridgingportion and thereby secure the member 28 thereto. The tab 4! is formedwith spaced shoulder 43 that engage the top of the bridging 3 portion 29and the end 42 is depressed inwardly of the plane of the end 31 so thatthe ends 32 and 31 of the channel members are in spaced relation.

Preferably the channel members 2'! and 28 are made of aluminized steel,steel to which aluminum has been bonded, or other suitable materialwhich forms; a surface having good reflection characteristics. Outwardlyprojecting crimps 44 are provided on the sides of the channel member 21for purposes of imparting rigidity thereto.

Tabs 46 depending downwardlyirom the sides 3| are arranged to bedisposed in the housing 23 of the pilot burner assembbf: for maintaininthe dissipator in assembled relation with the pilot burner. Dependingtabs 4'! on the sides 3| are provided for mounting purposes whilenotches48 formed adjacent the open end of the channelshaped member 27 areformed for indicating'to assemblymen positions at which the channelepedm mber 2. be out n to adapt itier difl'erentsizes of burner boxes.

F '7 h w a mo ifica ion. oi the invention in which the extreme end 52.;or a channel-shaped member 53 of the dissipator is; inclined upwardlywithin the confines of a back rail 54 of a range. To efl ect. thisdeformation of the channel-shaped member the sides 56' are cut as shownin the drawings.

The: dissipator 26 may be easily assembled in; a range or removedtherefrom, to permit servicing of the. components of the range. Toinstall the dissipator the open end 3.3. of the channel-shaped member21: is arranged to rest freely on the end wall it of the burner box M.The closed end of the dissi-pator is arranged so that. the, tabs 46project inwardly of the housing 23 and engage the sides thereof. In thisposition the dissi-fl pator rests in a substantially horizontal posi.-.tion. In its operation, products of combustion from the pilot burner 22'are carried along the inverted channel-shaped member 21 and are dis.-charg-ed at theopen end 33 into a chamber 5:?

formed; in the ends of the range: adjacent the top. As the products ofcombustion flow between the walls of the channel-shaped member, heat isconducted through the walls and bridging pore tion thereof to beradiated outwardly therefrom. Due to chimney action, cooling airflowsthrough a passageway 58' defined by spacing the channel-shaped members21- and 28 which tends to carry the heat being radiated orotherwisedissipated by the channel-shaped member 2-! and cools the latter.Concurrently with the cooling action of the air flowing through thepassageway 58 heat passing upwardly to the bridging portion 34 isreflected back in the direction of the channel-shaped member 21 and isacted upon again by the fljow of relatively cool air flowing through thepassageway 58'. Thus, heat from the pilot burner is dissipated over arelatively large area, and is subiected to, the effects of cooling air.Accordingly the, hfiat does not concentrate to effect a. h spot. ashes be t e ca heretofore. Tests show that there are HQ hot spots, on the,stove top that can injure an operator of a range. equ p h this cons unhis dissipator is. also extremely simple to make, and assemble and isrelatively inexpensive to produce. Another advantage of thisconstruction is. that the products. of combustion, which in previousconstructions in some instances, caused discoloration of the tops, arenow discharged into a space adjacent the ends of the range after theyhave been cooled to a temperature low enough not to cause discolorationof the enameled parts. Also the stability of the pilot burner in a rangeutilizing this dissipator is better since the flame is protected fromdrafts or other turbulent air conditions.

I claim:

1. In a gas range, in combination, a burner box having side walls, amain burner disposed in said b rner box, a top mounted to extend acrosssaid burner box having an opening for said main burner, a. pilot burnerfor said main burner mounted below said top, a first invertedchannel-shaped member positioned below the top and dvorlying said pilotburner, means for supporting said channel-shaped member to have thelatter extend from above said pilot burner to a position adjacent a sidewall, and a second inverted channel-shaped member belowthe top andpositioned n. spaced: r l tion above id first inverted chan nelsheped.member to define an air p e e tween said members for the passage ofcooling air; said members being formedof metal having good heatreflection; characteristics.

2., A heat; dissipator for a concentrated source of heat, comprising anelongated inverted channel-shaped member comprising a; bridging portionand spaced depending side members, means closing one end of said ehannelshaped, member, a second inverted channel-shaped member comprising a.second bridging portion and second spaced depending side members, saidsecond channel-shaped member overlying said first channel-shaped memberwith the, respective bridging portions thereof in. spaced relation todefine an air passagebetween the channel-shaped members.

3. The combination recited in claim, 2' in which the channel-shapedmembers have heat: reflecti-ng surfaces.

4. A heat dissipator for a. concentrated source of heat, comprising anelongated channel-shaped member having an inverted U-shaped cross section comprising a bridging portion and spaced sides, means closing oneend of said channelshaped member, a second channel-shaped member havingan inverted U-shapedcross section comprising a second bridgingportionWider than the first bridging portion and second spaced sides, meansclosing one end of the second channel-. shaped member, means betweensaid bridging portions to space them apartv and crimped' por tionsformed on the sides of at least one of said members. for spacingthesides of the first mem her from the sides of the second member to de'finej an air flow passage between said members adjacent. the closed endsof said members.

5 The combination recited in claim 4 in which the channel-shapedmembers.are formed" from aluminized steel.

LEONARD M'eCAIWA IANT.

lieterences. Cited in the. his or his patent.

